Telephone base unit



FIG. 1 is a front perspective view of a telephone base unit of the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a first side view thereof; and,

FIG. 7 is a second side view thereof.

The broken lines in the drawings depict parts of the telephone base unit that form no part of the claimed design. 

CLAIM I claim the ornamental design for a telephone base unit, as shown and described. 